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R&D and productivity : estimating production functions when productivity is endogenous

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Author Info
Ulrich Doraszelski ()
Jordi Jaumandreu ()

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Abstract

We develop a simple estimator for production functions in the presence of endogenous productivity change that allows us to retrieve productivity and its relationship with R&D at the firm level. By endogenizing the productivity process we build on the recent literature on structural estimation of production functions. Our dynamic investment model can be viewed as a generalization of the knowledge capital model (Griliches 1979) that has remained a cornerstone of the productivity literature for more than 25 years. We relax the assumptions on the R&D process and examine the impact of the investment in knowledge on the productivity of firms. We illustrate our approach on an unbalanced panel of more than 1800 Spanish manufacturing firms in nine industries during the 1990s. Our findings indicate that the link between R&D and productivity is subject to a high degree of uncertainty, nonlinearity, and heterogeneity across firms. By accounting for uncertainty and nonlinearity, we extend the knowledge capital model. Moreover, capturing heterogeneity gives us the ability to assess the role of R&D in determining the differences in productivity across firms and the evolution of firmlevel productivity over time.

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Paper provided by Universidad Carlos III, Departamento de Economía in its series Economics Working Papers with number we078652.

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Date of creation: Dec 2007
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Handle: RePEc:cte:werepe:we078652

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  2. Garry F. Barrett & Stephen G. Donald, 2003. "Consistent Tests for Stochastic Dominance," Econometrica, Econometric Society, vol. 71(1), pages 71-104, January. [Downloadable!] (restricted)
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  9. Bronwyn Hall & Fumio Hayashi, 1989. "Research and Development As An Investment," NBER Working Papers 2973, National Bureau of Economic Research, Inc. [Downloadable!] (restricted)
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  10. Griffith, Rachel & Harrison, Rupert & Van Reenen, John, 2004. "How Special is the Special Relationship? Using the Impact of US R&D Spillovers on UK Firms as a Test of Technology Sourcing," CEPR Discussion Papers 4698, C.E.P.R. Discussion Papers. [Downloadable!] (restricted)
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  13. Ackerberg, Daniel & Lanier Benkard, C. & Berry, Steven & Pakes, Ariel, 2007. "Econometric Tools for Analyzing Market Outcomes," Handbook of Econometrics, in: J.J. Heckman & E.E. Leamer (ed.), Handbook of Econometrics, edition 1, volume 6, chapter 63 Elsevier. [Downloadable!] (restricted)
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  17. Rachel Griffith & Stephen Redding & John Van Reenen, 2000. "Mapping the two faces of R&D: productivity growth in a panel of OECD industries," IFS Working Papers W00/02, Institute for Fiscal Studies. [Downloadable!]
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  18. James Levinsohn & Amil Petrin, 2003. "Estimating Production Functions Using Inputs to Control for Unobservables," Review of Economic Studies, Blackwell Publishing, vol. 70(2), pages 317-341, 04. [Downloadable!] (restricted)
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  19. Juan J Dolado & Carlos Garcia--Serrano & Juan F. Jimeno, 2002. "Drawing Lessons From The Boom Of Temporary Jobs In Spain," Economic Journal, Royal Economic Society, vol. 112(721), pages F270-F295, June. [Downloadable!] (restricted)
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  20. Douglas Rivers & Quang Vuong, 2002. "Model selection tests for nonlinear dynamic models," Econometrics Journal, Royal Economic Society, vol. 5(1), pages 1-39, June. [Downloadable!] (restricted)
  21. Marc-Andreas Muendler, 2004. "Estimating Production Functions When Productivity Change Is Endogenous," University of California at San Diego, Economics Working Paper Series 2004-05, Department of Economics, UC San Diego. [Downloadable!]
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  22. Ariel Pakes & Mark Schankerman, 1984. "An Exploration into the Determinants of Research Intensity," NBER Chapters, in: R & D, Patents, and Productivity, pages 209-232 National Bureau of Economic Research, Inc. [Downloadable!]
  23. Pavcnik, Nina, 2002. "Trade Liberalization, Exit, and Productivity Improvement: Evidence from Chilean Plants," Review of Economic Studies, Blackwell Publishing, vol. 69(1), pages 245-76, January.
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  24. Huergo, Elena & Jaumandreu, Jordi, 2004. "Firms' age, process innovation and productivity growth," International Journal of Industrial Organization, Elsevier, vol. 22(4), pages 541-559, April. [Downloadable!] (restricted)
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